mambourg



Oct. 15,y 1929. L.. c. MAMBOURG SHEET GLASS APPARATUS Filed Sept. 23, 1926 www Patented oct. 15,- 1929 UNITED STATES PATENT oEl-icEY LUKE C. MAMBOURG, OF LANCASTER, OHIO, ASSGNOR TO THE LIBBEY-OWENS GLASS y COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO SHEET-Grass APPARATUS This invention is an improvementin the art of drawingsheet glass, and relates more particularly to improved apparatus for maintaining thewidth of the sheet.

yWhile thisinvention is not-limited to use with any one system of producing sheet glass, it is illustrated in connection with an apparatusof the general type set forth in the patent to Colburn, No. 1,248,809, granted December 4, 1917. In this system a continuous sheet of glass is drawn upwardlyffrom a bath of molten glass, and then rwhile in a semi-plastic condition, although,substantially set in its final sheet form, is bent into a horizontal plane and carried off through a suitable drawlng mechanism and into a leer. As is well known in the art, some means must be provided to maintainvthe width of the sheet drawn, otherwise it will gradually narrow these knurled rollers horizontally and so that Vao they engage the sheet at substantially right angles relative thereto. I

An important object of the present invention is the provision of means which will notV only serve to maintain the sheet to width, but Ywill act to stretch the sheet or produce a sheet relatively wider than its base, thus making it lpossible to produce a sheet of greater width than with thefold arrangement.

Another object ofthe invention is the provision `of width maintainingv and sheet stretching meansuin the form of rotatable members engaging the edges of the sheet, and preferably arranged at anangle other than a right angle relative to'said' sheet. l Another object of the invention is the proy vision of knurled rollers extending diagonally of the sheet for maintaining the same toy width, and for exerting a lateral tension thereto.

A further object of the invention is the provision of means for raising and lowering the knurled rollers, together with means for adjusting the angle 0f the said rollers relative to i the sheet.

ther objects and advantages of the invention will become more apparent during the course of the following description when taken in connection with the accompanying drawings.

In the drawings wherein like numerals are employed to designate like parts throughout the same,

Figa 1l is a longitudinal vertical section through a sheet drawing apparatus showing associated therewith width maintaining mea-ns constructed in accordance with the present invention,

Fig. 2 is a view taken at right angles to Fig. 1, and

Fig. 3 is a Fig. 2.

Referring to the drawings, the numeral 10 designates a draw pot inl which is disposed a bath of molten glass 11. The pot 10 rests plan view taken on line 3-3 of upon suitable supports and is heated from sence of suitable width maintainers, Ythe sheet does not keepa desired width, so to prevent this narrowing up, rollers 14 are placed on both sides of the glass and at opposite edges thereof, and preferably in the meniscus 15.

The knurled rollers 14 are carried upon tubes or hollow shafts 16 journaled in suitable ybearings 17 mounted upon a base 18. Gears 19 are keyed on the tubes 16 and in constant -mesh with each other as shown in Fig. 3.

One way of mounting the tubes is to have one tube fixed and the Vother mounted upon a pivot or the like so Athat the pivoted tube can be moved to and Vfrom the stationary tube. A

vspring 2() is arranged between the outer ends of the tubes, to normally 4urge the knurled rollers toward each other. Of course, the

spring will be sufficiently weak or resilient to permit the drawing of glass between the ,knurled rollers. A beveled gear 21 is carried by one of the tubes while a drive pinion 22 is in mesh therewith to rotate both of the tubes simultaneously and in opposite directions.

lin order to keep the knurled rollers 14 from overheating, pipes 23 are run through the tubes in such a manner that a continuous flow el cooling medium can be passed through the rollers so that an even and constant temperature can be maintained.

lt is to be noted that the knurled rollers lll entend diagonally eil the sheet, or at an obtuse angle relative thereto. By being so positioned, the knurled rollers lil will serve not only to maintain the sheet to width, but will also act to stretch the sheet transversely, thus making` it possible to obtain a wider sheet than has heretofore been possible from a given width of pot.

ln the Colburn machine above relered to, wherein the hnurled rollers are arranged horizontally and at right angles to the sheet, it is customary to blow a et of air on the edges of the sheet to assist in building up the edges and maintaining the sheet to width. rlhis process results in the formation oil a relatively thick edge portion which extends inwardly on the sheet a substantial distance. l-lowever, by tilting the linurled rollers relative to the sheet taught by the present invention, it is possible to eliminate the necessity of blowing a jet ot air on the edges olf the sheet. Moreover, when the rollers are so tilted relative te the sheet they will serve to grip and direct the et ges thereof upwardly and outwardly, thereby stretching` the sheet transversely whereby to permit a. relatively wider sheet to be drawn from a given width ot pot than with the old arrangement.

rlhe base 18 is pivotally mounted as at 24e to a bearing member 25 which is provided with a depending screw-threaded rod 2G, which is received within a supporting frame 27. A, nut 28 is threaded on the rod 26, and rests upon the Ytrame 27. Thus, the base 1'8 and knurlcd rollers la can be readily raised and lowered relative to the draw pot l0 by simply rotating the nut 28 in the desired direction.

Carried by the bearing` member 25 are outwardly and oppositely directed lugs 29 through which are threaded vertical adjusting screws 30 which contact with the bottom ot' the hase 18. lllhen it is desired to adjust the angle ot the km rled rollers ll relative to the sheet lf2, it is simply necessary to loosen one cot the adjusting screws 30 and subsequently tighten the other screw, whereupon the base 18 will be necked about its pivot 24e to change the angle of the rollers lei.

lt is to be understood that the 'form ol the invention herewith shown and described to he taken as the preferred embodiment ol the same, and that various changes in the shape, sse and arrangement oi parts may be resorted to without departing trom the spirit of the invention or the scope oll the subjoined claims.

Claims:

l. ln sheet glass apparatus, a receptacle adapted to contain a mass o lf molten glass, means for drznving` a sheet thoreilrom, rollers engaging both sides o if the slice! at the opposite edges thereof, said rollers being inclined at an angle to the direction ol' movement ol the sheet being drawn, sharl'ls carrying said rollers, a base 'for supporting :iaid shafts, a bearing member to which the base is piii'otally mounted, oppositcly dircrlcd lungs carried by said bearing membert1 and adjusting screws passing upwardly iilnouu'h thc lufijs and bearing against the uinilcrsuril'zuc olf said base.

2. ln sheet glass apparatus, a reccplucle adapted to contain a mass oli mollen gloss, means ttor drawing` a sheet therefrom, rollers engaging both sides oil" the sheet al he opposite edges thereof, said rollers being inclined at an angle lo the direction ol increment olf the sheet being drawn, shafts carrying said rollers, a base upon which said shafts are mounted, a supporting member ilfor the lan-'e having a threaeed portion, a supporting Jframe 'lior receiving the threaded portion therein, and a nut received upon the threaded portion and resting upon said. supporting trame.

3. ln sheet glass appi'iratus, a reccplacle adapted to contain a mass ot molten glass, means 'for drawing a sheet thcrcilironi,l rollers` engaging both sides oil? the sheet at the opposite edges thereof, said rollers being` inclined at an angle to the direction el moii'cnicnt olt the sheet being` drawn, shalts carrying said rollers, a base lier supporting` said sha l'ls, a bearing member to which the hase pivolully mounted, said bearing ,member being provided with a threaded portion, a supporting ran'ie for receiving` the thi' laded portion therein, a nut received upon the threaded por tion and resting upon the .supportinu` traine, oppositely directed lugs carried by sa id bearing member and adjusting screws iiasaingi; upwardly through said lugs and bearing` aga i nel; the undersurface ot said base.

Signed at Lancaster, in the county of lla irield and State of Chio, this llith day ot fileptemloer, 1926.

LUKE C. llli'llllll(lllllll.

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